laptop dvd burner

Recently, the dvd reader/writer, on my Acer laptop stopped working. It would just run and stop, run and stop. It was suggested that the laser had probably broken, so a new drive was needed.
I purchased a new drive and installed it. The original trouble is still occurring, i.e it will not work. Device Manager has always stated that the drive is a Hitachi.... although the label on the drive says it is a Lite-On.
Looking on the web I can only find a driver for this model from 2007. As my laptop was made in 2007 I am presuming the driver was OK as it has worked until recently.
Is it possible I could have deleted something from my computer that has stopped it working.
I do not know if the codes below mean anything.
These appeared when Windows stopped responding whilst trying to burn a disc.
C:\Users\Vista User\AppData\Local\Temp\WER251D.tmp.version.txt
C:\Users\Vista User\AppData\Local\Temp\WER3747.tmp.appcompat.txt
C:\Users\Vista User\AppData\Local\Temp\DWD3777.tmp\Explorer.exe.hu.kdmp
C:\Users\Vista User\AppData\Local\Temp\DWD3777.tmp\Explorer.exe.xml

Please ignore the section on Hitachi/Lite-on, I looked at the wrong drive in Device manager. I found the correct drive, uninstalled it and re-booted. Windows found and installed the driver for the correct drive, but it still does not work.

No CD/DVD or CD-ROM access is missing error Code 19, Code 31, Code 32, Code 39, or Code 41
Try this if the optical drives are not appearing in My Computer or Device Manager.
(This is sometimes caused by the removal of Roxio or other writing software.)

http://www.dougknox.com/xp/utils/XP_CD-DVD-Fix.zip
Download XP_CD-DVD-Fix.zip and save this file to your hard drive. Navigate to where you saved it and double click the file to extract the contents. Locate the EXE file you extracted and double click it. A confirmation dialog will appear when the script is done. You may need to reboot for the change to take effect.
This utility is only intended for Windows® XP, but also appears to work for Vista and Windows 7.
You may need Administrator level access to use this utility. If you do not have Administrator level access, the program will say it is finished, but will not have made any changes.

or manual fix
Run regedit and navigate to registry key
HKEYLOCALMACHINE\SYSTEM\CurrentControlSet\Control\Class\ {4D36E965-E325-11CE-BFC1-08002BE10318}.
Highlight it and in the right pane, find the Upperfilters and Lowerfilters values.
Highlight each one in turn, right click and delete them.
Close regedit and restart the computer.
If in doubt make a restore point before making changes.